Excavator-dipper door



I. I. GREULING; EXCAVATOR DIPPER' 000R. APPLICATION FILED '8. 24.1920.

Immune 28,1921.

2 SHEETS-SHEET 1.

gwa wn fo'a 1.3. GREULING. EXCAVATOR DIPPE'R DOOR. APPLICATION FILED FEB. 24, 1920.

1,383,102.. Patented June 28,1921.

2 SHEETS-SHEET 2.

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aftoznu UNITED STATES PATENT OFFICE.

EXCAVATOR-DIIPPER DOOR.

Specification of Letters Patent.

Patented June 28, 1921.

Application fi1ed February 24, 1920. Serial No. 360,637.

To all whom it may concern:

Be it known that I, JOHN J. GREULING, a citizen of the United States, residing at Hibbing, in the county of St. Louis and State of Minnesota have invented new and useful. Improvements in Excavator-Dipper Doors, of which the following is a specification.

The object of my present sole invention is the provision of an excavator dipper door embodying a strong, freely movable and safe latch for securing the door in closed position, and for permitting release of the door for the proper discharge of the contents of the dipper; the latch and its appurtenances being housed in such manner that there is no liability of the same being injured or deranged by the rough action to which the dipper is necessarily subjected.

To the attainment of the foregoing the invention consists in the peculiar and advantageous dipper door hereinafter described and definitely claimed.

In the accompanying drawings, hereby made a part hereof:

Figure 1 is a view showing a part of a dipper and a dipper door constructed in accordance with my invention.

Fig. 2 is a perspective of the latch housing per .90, as the same appears when removed from the dipper door.

Fig. 3 is a face view showing the latch and its housing.

Fig. 4 is a longitudinal section of the same, illustrating the latch arrangement of the housing, the latch, the latch spring, and the anti-friction rollers for easing movementof the latch.

- Figs. 5 and 6 are detail sections.

Fig. 7 is an elevation of the outer comparatively large end of the housing.

Fig. 8 is an elevation of the inner comparatively small end of the housing.

Similar numerals of reference designate corresponding parts in all of the views of the drawings.

The dipper body 1 may be and preferably is of the ordinary well known construction, and the dipper door 2 is preferably connected with the body in the conventional manner, as appears at 3 in Fig. 1.

The dipper door is preferably, though not necessarily, formed of manganese steel, as are the hinge arms 3 and the elements hereinafter specifically referred to.

The dipper body 1 is provided at 4 with a k p d t e deer 2 carrie at its out r side a latch or latch bolt 5, which is housed and movable rectilinearly in a housing as shown. The said housing is made u of a mayor section 6, and a minor section disposed at the inner end of the major section. The major section 6 is flanged at 8, and provided at 9 with transverse webs, calculated to lend increased stiffness and strength to the section. At 10 in its inner side the section 6 provided with a pocket which is designed to receive a series of anti-friction rolls 11, disposed at right angles to the length of the latch or bolt 5. The flanges 8 of the section 6 serve for the reception of bolts 12 through the medium of which the section is fixedly and strongly connected to the dipper door 2, as shown. The section 7 is provided with a transverse flange 13 which is opposed to an inner end flange 14 of the section 6, and is fixedly connected to said flange 14 through the medium of bolts 15. The section 7 is also flanged at 16 for the reception of bolts 17 through the medium of which the section is connected to the dipper door. In the section 7 is formed a pocket 18 which is disposed at the opposite side of the latch or bolt 5 with reference to the pocket 10, and is designed to receive a plurality of anti-friction rolls 19. By virtue of the relative arrangement of the rolls 11 and 19 to the latch or bolt 5, it will be manifest that the rolls will serve after the manner of ordinary anti-friction rolls, and at the same time will ease any lateral thrust that may be imposed upon the latch or bolt 5, with the result that the said bolt 5 is prevented from binding and is adapted to move freely under all conditions. The section 7 is also provided with a lubricant duct 20 that leads from the outer side of the section 7 to the guideway therein for the latch or bolt 5, so that case of movement of the latch or bolt 5 is further assured.

It will be readily understood from the foregoing that the latch or bolt 5 is for cooperation with the keeper 4 in securing the door 2 in closed position, and that the latch or bolt 5 is designed to be connected through a cable 21 with any approved means through the medium of which the latch or bolt 5 may be retracted to release and permit of opening of the dipper door.

It will be apparent from the foregoing that my novel housing equipped as described. is adapted to assure free movement Of the latch or bolt 5, and at the same time is calculated to adequately protect the said latch or bolt 5 and its appurtenances against injury incidental to the necessary rough use of the dipper. Among the appurtenames of the latch or bolt 5 alluded to is a spring 21' which surrounds the latch or bolt 5, is interposed between the abutment 22 in the section 6 and an abutment 23 on the latch or bolt, and is adapted to yieldingly press the latch or bolt forwardly so as to enable the beveled end 24: thereof to snap into engagement with the keeper 4: when the door 2 is swung to closed position.

Notwithstanding the practical ac vantages of my improvement as set forth, it will be appreciated that the improvement is simple and strong, and therefore does not add greatly to the cost of the dipper door.

Having described my invention, what I claim and desire to secure by Letters-Patent, is:

1. A door for excavator clippers having a latch or bolt and also having a housing for the said latch or bolt, fixed with respect to the door and disposed at the outer side there of; the said housing being provided adjacent to its ends and at inner and outer sides, respectively, of the latch or bolt with pockets, and anti-friction rolls being arranged in series in each of said pockets 2. A door for excavator dippers having a latch and a housing for the latch; the said housing comprising a major section having flanges and transverse Webs and a minor section having a transverse web and flanges, bolts connecting the opposed webs of the sections, and bolts connecting the flanges of the sections to the dipper door to which the said flanges are opposed. V V V 3. A door for excavator dippers having a latch or bolt and a housing therefor; the said housing being fixed with respect to the door at the outer side thereof and being equipped with anti-friction rolls adjacent to the ends of the housing and at opposite sides of the latch or'bolt and at right angles to the length thereof and being also equipped with a spring to yieldingly press the latch or bolt forwardly.

In testimony whereof I affix my signature.

JOHN J. GREULING. 

